{#<nav class="navbar navbar-default">#}
{#      <div class="container">#}
{#        <div class="navbar-header">#}
{#          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">#}
{#            <span class="sr-only">Toggle navigation</span>#}
{#            <span class="icon-bar"></span>#}
{#            <span class="icon-bar"></span>#}
{#            <span class="icon-bar"></span>#}
{#          </button>#}
{#          <a class="navbar-brand" href="/">学习笔记</a>#}
{#        </div>#}
{#        <div id="navbar" class="collapse navbar-collapse">#}
{#          <ul class="nav navbar-nav">#}
{#            <li><a href="/">主页</a></li>#}
{#            <li><a href="/articles">笔记</a></li>#}
{#            <li><a href="/about">关于</a></li>#}
{#          </ul>#}
{#          <ul class="nav navbar-nav navbar-right">#}
{#            {% if session.logged_in %}#}
{#              <li><a href="/dashboard">控制台</a></li>#}
{#              <li><a href="/logout">退出</a></li>#}
{#            {% else %}#}
{#              <li><a href="/register">注册</a></li>#}
{#              <li><a href="/login">登录</a></li>#}
{#            {% endif %}#}
{#          </ul>#}
{#        </div><!--/.nav-collapse -->#}
{#      </div>#}
{#    </nav>#}
